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  • Blog Post: Interpreting Event 153 Errors

    Hello my name is Bob Golding and I would like to share with you a new event that you may see in the system event log.  Event ID 153 is an error associated with the storage subsystem. This event was new in Windows 8 and Windows Server 2012 and was added to Windows 7 and Windows Server 2008 R2 starting...
  • Blog Post: What Did Storport Do With My I/O?

    In a previous article I showed how to track an I/O request from the filesystem, through the class driver, and to the storage driver.  In that article I concluded with " From this data we can usually assume that the request has been sent to the disk drive and we are waiting for the disk to respond"...
  • Blog Post: Where Did My Disk I/O Go?

    Hello, Mr. Ninja back again.   I recently discovered that although my team often tracks I/O from the file system through to the disk controller, we have never publicly documented the steps required to do this.   This seems like a great opportunity for a blog because most of the structures are...
  • Blog Post: LUN Discovery in a Nutshell

    The way the disk configuration is determined on a Windows system is by a process called “discovery”.   If the disk configuration is ISCSI or Fibre the process is very similar.   I will describe the process on each and you will see they are very similar.   To simplify things this blog will...
  • Blog Post: Understanding Storage Timeouts and Event 129 Errors

    Greetings fellow debuggers, today I will be blogging about Event ID 129 messages.   These warning events are logged to the system event log with the storage adapter (HBA) driver’s name as the source.   Windows’ STORPORT.SYS driver logs this message when it detects that a request has timed out...
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